self-interest

noun

self-in·​ter·​est ˌself-ˈin-t(ə-)rəst How to pronounce self-interest (audio)
-ˈin-tə-ˌrest, 
-ˌtrest;
-ˈin-tərst
Synonyms of self-interestnext
1
: a concern for one's own advantage and well-being
acted out of self-interest and fear
2
: one's own interest or advantage
self-interest requires that we be generous in foreign aid
self-interested
ˌself-ˈin-t(ə-)rə-stəd How to pronounce self-interest (audio)
-ˈin-tə-ˌre-, 
-ˈin-ˌtre-;
-ˈin-tər-
adjective
self-interestedly adverb
self-interestedness noun

Examples of self-interest in a Sentence

her degree of self-interest is perhaps best reflected in her favorite topic of conversation—herself
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Her perspective—consistently serene and largely without self-interest—lends the novel a restrained and gently contemplative tone. — Natasha O'Neill, Vanity Fair, 22 Oct. 2026 The language, the words, the people, the sentiment erased, the websites vanished, the funds dried, and the true spirit of self-interest revealed. — Kamau Bobb october 21, Literary Hub, 21 Oct. 2026 Honorable rebels take a stand, work, and sacrifice, even against self-interest to bravely bring about something other than the chaos that naturally exists without applied effort to create something good. — Joe Kinsey Outkick, FOXNews.com, 20 Oct. 2026 The basic model of competitive markets which one finds in an introductory economics textbook—where independent firms engage in cold arm’s-length transactions motivated by unadulterated self-interest—does not apply to the industry. — Gideon Lewis-Kraus, New Yorker, 19 Oct. 2026 See All Example Sentences for self-interest

Word History

First Known Use

1595, in the meaning defined at sense 2

Time Traveler
The first known use of self-interest was in 1595

Browse Nearby Words

Cite this Entry

“Self-interest.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/self-interest. Accessed 27 Oct. 2026.

Kids Definition

self-interest

noun
self-in·​ter·​est
ˈsel-ˈfin-trəst, 
-ˈfint-ə-rəst
1
: a concern for one's own advantage
acted out of self-interest and fear
2
: one's own interest or advantage
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster